<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<style>
		.div{
			border: 1px solid red;
		}
	</style>
	<body>
		<div class="boxf">
			<div class="boxup">
				
			</div>
			<div class="boxdown">
				
			</div>
		</div>
	</body>
</html>